Expose new video codec factories in the PeerConnectionFactory API

webrtc/media/engine/webrtcmediaengine.h

Index: webrtc/media/engine/webrtcmediaengine.h
diff --git a/webrtc/media/engine/webrtcmediaengine.h b/webrtc/media/engine/webrtcmediaengine.h
index 8740917e9f6a75f642d0b4ab1cf80d5581d67ab3..8f88139b9965b5482b7ed49ad73a053300bcd74f 100644
--- a/webrtc/media/engine/webrtcmediaengine.h
+++ b/webrtc/media/engine/webrtcmediaengine.h
@@ -22,6 +22,8 @@ class AudioDecoderFactory;
 class AudioDeviceModule;
 class AudioMixer;
 class AudioProcessing;
+class VideoDecoderFactory;
+class VideoEncoderFactory;
 }
 namespace cricket {
 class WebRtcVideoDecoderFactory;
@@ -81,6 +83,18 @@ class WebRtcMediaEngineFactory {
       WebRtcVideoDecoderFactory* video_decoder_factory,
       rtc::scoped_refptr<webrtc::AudioMixer> audio_mixer,
       rtc::scoped_refptr<webrtc::AudioProcessing> apm);
+
+  // Create a MediaEngineInterface with optional video codec factories. These
+  // video factories represents all video codecs, i.e. no extra internal video
+  // codecs will be added.
+  static std::unique_ptr<MediaEngineInterface> Create(
+      rtc::scoped_refptr<webrtc::AudioDeviceModule> adm,
+      rtc::scoped_refptr<webrtc::AudioEncoderFactory> audio_encoder_factory,
+      rtc::scoped_refptr<webrtc::AudioDecoderFactory> audio_decoder_factory,
+      std::unique_ptr<webrtc::VideoEncoderFactory> video_encoder_factory,
+      std::unique_ptr<webrtc::VideoDecoderFactory> video_decoder_factory,
+      rtc::scoped_refptr<webrtc::AudioMixer> audio_mixer,
+      rtc::scoped_refptr<webrtc::AudioProcessing> audio_processing);
 };
 
 // Verify that extension IDs are within 1-byte extension range and are not